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<?php |
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declare(strict_types=1); |
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/* |
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* The MIT License (MIT) |
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* |
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* Copyright (c) 2014-2018 Spomky-Labs |
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* |
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* This software may be modified and distributed under the terms |
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* of the MIT license. See the LICENSE file for details. |
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*/ |
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namespace U2FAuthentication\Fido2; |
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use U2FAuthentication\Fido2\AttestationStatement\AttestationStatementSupportManager; |
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class AuthenticatorAttestationResponseValidator |
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{ |
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private $attestationStatementSupportManager; |
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private $credentialRepository; |
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public function __construct(AttestationStatementSupportManager $attestationStatementSupportManager, CredentialRepository $credentialRepository) |
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{ |
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$this->attestationStatementSupportManager = $attestationStatementSupportManager; |
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$this->credentialRepository = $credentialRepository; |
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} |
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/** |
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* @see https://www.w3.org/TR/webauthn/#registering-a-new-credential |
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*/ |
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public function check(AuthenticatorAttestationResponse $authenticatorAttestationResponse, PublicKeyCredentialCreationOptions $publicKeyCredentialCreationOptions, ?string $rpId = null): void |
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{ |
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/** @see 7.1.1 */ |
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//Nothing to do |
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/** @see 7.1.2 */ |
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$C = $authenticatorAttestationResponse->getClientDataJSON(); |
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/* @see 7.1.3 */ |
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if ('webauthn.create' !== $C->getType()) { |
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throw new \InvalidArgumentException('The client data type is not "webauthn.create".'); |
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} |
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/* @see 7.1.4 */ |
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if (hash_equals($publicKeyCredentialCreationOptions->getChallenge(), $C->getChallenge())) { |
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throw new \InvalidArgumentException('Invalid challenge.'); |
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} |
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/** @see 7.1.5 */ |
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$rpId = $rpId ?? $publicKeyCredentialCreationOptions->getRp()->getId(); |
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if (null === $rpId) { |
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throw new \InvalidArgumentException('No rpId.'); |
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} |
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$parsedRelyingPartyId = parse_url($C->getOrigin()); |
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if (!array_key_exists('host', $parsedRelyingPartyId) || !\is_string($parsedRelyingPartyId['host'])) { |
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throw new \InvalidArgumentException('Invalid origin rpId.'); |
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} |
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if ($parsedRelyingPartyId['host'] !== $rpId) { |
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throw new \InvalidArgumentException('rpId mismatch.'); |
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} |
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/* @see 7.1.6 */ |
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if ($C->getTokenBinding()) { |
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throw new \InvalidArgumentException('Token binding not supported.'); |
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} |
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/** @see 7.1.7 */ |
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$getClientDataJSONHash = hash('sha256', $authenticatorAttestationResponse->getClientDataJSON()->getRawData()); |
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/** @see 7.1.8 */ |
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$attestationObject = $authenticatorAttestationResponse->getAttestationObject(); |
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/** @see 7.1.9 */ |
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$rpIdHash = hash('sha256', $rpId); |
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if (hash_equals($rpIdHash, $attestationObject->getAuthData()->getRpIdHash())) { |
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throw new \InvalidArgumentException('rpId hash mismatch.'); |
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} |
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/* @see 7.1.10 */ |
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if (!$attestationObject->getAuthData()->isUserPresent()) { |
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throw new \InvalidArgumentException('User was not present'); |
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} |
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/* @see 7.1.11 */ |
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if (AuthenticatorSelectionCriteria::USER_VERIFICATION_REQUIREMENT_REQUIRED === $publicKeyCredentialCreationOptions->getAuthenticatorSelection()->getUserVerification() && !$attestationObject->getAuthData()->isUserVerified()) { |
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throw new \InvalidArgumentException('User authentication required.'); |
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} |
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/* @see 7.1.12 */ |
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if (0 !== $publicKeyCredentialCreationOptions->getExtensions()->count()) { |
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throw new \InvalidArgumentException('Extensions not supported.'); |
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} |
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/** @see 7.1.13 */ |
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$fmt = $attestationObject->getAttStmt()->getFmt(); |
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if (!$this->attestationStatementSupportManager->has($fmt)) { |
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throw new \InvalidArgumentException('Unsuppoorted attestation statement format.'); |
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} |
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/** @see 7.1.14 */ |
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$attestationStatementSupport = $this->attestationStatementSupportManager->get($fmt); |
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if (!$attestationStatementSupport->isValid($attestationObject->getAttStmt(), $attestationObject->getAuthData(), $C)) { |
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throw new \InvalidArgumentException('Unvalid attestation statement.'); |
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} |
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/** @see 7.1.15 */ |
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/** @see 7.1.16 */ |
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/** @see 7.1.17 */ |
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$credentialId = $attestationObject->getAuthData()->getAttestedCredentialData()->getCredentialId(); |
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if ($this->credentialRepository->hasCredentialId($credentialId)) { |
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throw new \InvalidArgumentException('The credential ID already exists.'); |
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} |
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/* @see 7.1.18 */ |
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/* @see 7.1.19 */ |
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} |
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} |
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Spomky-Labs /
u2f-php
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